One among our certified fire extinguisher specialists will arrive at your place and conduct an annual inspection on all fire extinguishers. Fire Extinguishers by UL Ranking All Fire Extinguishers by UL Score 1A:10B:C 1A:20B:C 2A:10B:C 2A:40B:C 3A:40B:C 4A:40B:C 4A:60B:C 4A:80B:C 10A:120B:C 2A 2A: